The resolving power of objectives may be determined experimentally with simple but sensitive apparatus. Denoting by o the least angular separation between the objects to be clearly separated in the image, o = /b a/ lambda //b r/, where /b a/ is a constant and /b r/ the radius of the lens. It is found that, photographing one half of an uncemented half-tone screen, the constant a varies from 0.50 for an image showing no detail, to 0.90 for an image just free from defects. The theoretical value of... Topic: optics
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byAguilón, François de, 1567-1617; Rubens, Peter Paul, 1577-1640; Galle, Théodore, 1571-1633
Engraved t.p. and vignettes at beginning of each of the six books are by Theodoor Galle after Peter Paul Rubens; see Rooses. Printer's device (compasses) on recto of last leaf. Numerous in-text woodcut diagrams, one engraved. Decorated initials Topic: Optics
Contents: Introduction; The adiabatic and cyclic case; general approach; Berry's approach; Berry's phase; Angular momentum and monopoles; The kinematic approach; Total, geometric, and dynamical phases; Geodesics; Bargmann invariants; Pancharatnam's phase and its measurement by polarimetry and interferometry; Interferometric arrangement; Polarimetric arrangement; Geometric phase for mixed states; diagonal geometric phases and geometric phase between orthogonal states; Thomas rotation in... Topics: Optics, "